package book;

public class BookList {

    //定义一个常量
    private static final int  DEFAULT_SIZE = 10;
    private Book[] books = new Book[DEFAULT_SIZE];
    private int usedSize;//记录当前books数组当中 有多少本书

    public BookList(){
        books[0] = new Book("三国演义","罗贯中",50,"小说");
                books[1] = new Book("红楼梦","曹雪芹",45,"小说");
                books[2] = new Book("西游记","吴承恩",60,"小说");
                this.usedSize = 3;
    };

    //获取书架上 指定的 一本书
    public Book getBook(int pos){
        return this.books[pos];
    }

    public void setBook(Book book) {
        this.books[usedSize] = book;
    }
    public void setBook(int pos,Book book) {
        this.books[pos] = book;
    }

    public int getUsedSize() {
        return usedSize;
    }

    public void setUsedSize(int usedSize) {
        this.usedSize = usedSize;
    }
}
